Flush Valve

ABSTRACT

A flush valve includes a dual flush body for connecting to a flapper overflow tube of a bath-sanitation product, a dual control switch box and a positioning base, wherein an elastic sealing gasket is provided on the positioning base and matching with a sealing layer of a flapper base, the dual control switch box comprises a control chain component, a control rotating shaft is mounted inside a rotating shaft cavity of the dual control switch box, wherein one end of the control rotating shaft is connected to a handle, the other end of the control rotating shaft is connected to a push-button by a control swing rod, and the control rotating shaft is connected to the control chain component.

BACKGROUND OF THE PRESENT INVENTION

1. Field of Invention

The present invention relates to a flush valve of bath-sanitationproduction, and more particularly to a flush valve able to transfer asingle flush toilet into a dual flush toilet with two controllingmanners.

2. Description of Related Arts

At present, with the improvements in peoples living standards, modernflush valves have been widely used in the bathroom and replaced thetraditional way of hand-by flushing. This brings convenience to people'sdaily life.

However, among the present flush valves in the bathroom, a majority ofthe present flush valves are of single flush structure with singlepush-button or handle. That is to say, each flush is big flow andarranged according to the maximum needed flow after using, whichcertainly causes a huge waste of water.

In order to avoid the disadvantages of the above flush valve of singleflush structure a dual flush structure is invented, which has two flushoptions of big flow and small flow. People can choose big flow or smallflow under different conditions in the bathroom to realize the purposeof saving water. But in the process of transforming the ordinary singleflush structure into dual flush structure, the complicated installationand process need to be carried out by professionals because users cannotachieve it by themselves, resulting in high replacing cost of the flushvalve.

Moreover, although the dual flush valve can save water, the switchmanner of the present dual flush valves on market are controlled eitherby buttons or handles. Once the flush valve in the cistern leaks orcomes across other problems which are required to be changed, theplumber needs to know clearly about the size and type of the cistern andthe switch manner. If he failed to do so, he has to buy both twoswitches. These cause great inconvenience and a waste of resource to therepair worker.

SUMMARY OF THE PRESENT INVENTION

The purpose of the present invention is to overcome the disadvantages ofthe existing dual flush mentioned above, and provide alow-installment-cost flush valve with two controlling manners which canbe easily installed and saves water efficiently.

To attain this, the present invention obtains the following treatments.

The present invention provides a flush valve comprising a dual flushvalve body for connecting to an overflow tube of an existing flapper, apositioning base matching with the dual flush valve body for installingthe dual flush valve body, and an elastic sealing gasket attaching onthe positioning base and matching with a flapper base.

Further, a retaining cylinder sleeved on the overflow tube is providedon the positioning base.

Further, an adjustment circle matching with the overflow tube isprovided inside the retaining cylinder.

Further, one end of the adjustment circle is an opening loop with anopen part, while the opposite end is an closed cylinder.

Further, a locking component is available on the open part for lockingup the adjustment circle.

Further, two locking lugs are provided on the open part of theadjustment circle, and a locking hole is provided on each locking lugfor installing the locking component.

Further, the locking component comprises a butterfly bolt for crossingthrough the locking hole and a locking nut correspondingly matching withthe butterfly bolt.

Further, an adjustment insert-plate is provided in the adjustment circlefor suitable for overflow tubes with different diameters.

Further, the elastic sealing gasket is installed according to the layersurface of the base, that is, plane to plane or oblique to oblique.

Besides, the present invention further comprises a dual control switchbox matching with the dual flush valve body.

Further, the dual control switch box comprises a control chain componentconnected to the dual flush valve body for controlling the operation ofthe flush valve.

Further, a rotating shaft cavity is provided inside the dual controlswitch box and a control rotating shaft is mounted inside the rotatingshaft cavity, wherein one end of the control rotating shaft is connectedto a handle, the other end of the control rotating shaft is connected toa push-button by a control swing rod, and the control rotating shaft isconnected to the control chain component.

Further, a linkage component is provided inside the dual control switchbox and the handle is connected to the control chain component by thelinkage component.

Further, the linkage component comprises a control link bar and acontrol slider, wherein one end of the control link bar is connected tothe control rotating shaft, and the other end of the control link bar isconnected to the control slider; the control chain component isconnected to the control slider.

Further, a connecting member is provided inside the dual control switchbox and the push-button is connected to the control rotating shaft bythe connecting member.

Further, the connecting member comprises the control swing rod sleevedon the control rotating shaft.

Further, a handle-positioning blocker is provided inside the dualcontrol switch box for positioning and installing the handle.

Further, a button-positioning blocker is provided inside the dualcontrol switch box for positioning and installing the push-button.

The present invention has the following advantages:

1) Easy installment, and usually users can install alone withoutprofessionals, reducing installment cost, saving water efficientlybecause of the dual flush structure, and fitting with current products'requirement of saving energy.

2) Since the present invention has two flush-controlling manners of ahandle and a push-button, the repair workers can casually match acistern with a button or a handle, avoiding purchasing multiplecomponents for not sure about the size and type of the cistern orcustomer's favors; users can choose freely from the two flush options ofa handle and a button, which leads to efficient flush-control,convenient use and flexible operation, and simple structure to reduce acost of change or repair.

BRIEF DESCRIPTION OF THE ATTACHED DRAWINGS

FIG. 1: The structural view of present invention installed on anoverflow tube of flapper base.

FIG. 2: The exploded structural view of dual control switch box of thepresent invention.

FIG. 3: The overall structural view of the present invention.

FIG. 4: The perspective view of present invention with preferredembodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Further illustration of the present invention combined with the figuresand the preferred embodiment is following.

The Flush valve of the present invention is specifically applied to atoilet in the bathroom. As the FIG. 1 and the FIG. 3 show, the presentinvention comprises a dual flush valve body 2 connecting to an overflowtube 11 of flapper and a positioning base 3 for installing the dualflush valve body 2 on a flapper base 1.

An elastic sealing gasket 4 is provided on the dual flush valve body 2for matching with a sealing layer 12 on the flapper base 1. Whentransforming a single flush valve, the flapper base 1 and the elasticsealing gasket 4 can be installed plane to plane or oblique to obliqueas required. For example, if the sealing layer 12 is plane, the elasticsealing gasket 4 should turn over by 180 degrees vertically to a paperand then be installed back.

As the FIG. 1 shows, a retaining cylinder 31 provided on the positioningbase 3 is sleeved on the flapper overflow tube 11, an adjustmentpositioning circle 5 inside the retaining cylinder 31 matches with theflapper overflow tube 11, and an adjustment insert-plate 8 is providedin the adjustment positioning circle 5 adapted for flapper overflowtubes of different diameters.

One end of the adjustment positioning circle 5 is an opening loop havingan open part 51 while the other end is a cylinder. Two locking lugs 52and a locking component for locking up the adjustment positioning circle5 are provided on the open part 51, a locking hole 53 is provided oneach of the locking lugs 52 for installing the locking component, thelocking component comprises a butterfly bolt 6 for crossing through thelocking hole 53 and a locking nut 7 matching with the butterfly bolt 6;in specific application, the locking component can be other elementswith a function of locking up.

Besides, as the FIG. 2 and the FIG. 3 show, the flush valve of thepresent invention further comprises a dual control switch box 10providing two simultaneously available flush control manners of a handle14 and a push-button 13.

The dual control switch box 10 comprises a control chain component 9connected to the dual flush valve body 2 for controlling an operationstate of the flush valve. A rotating shaft cavity 10 a is providedinside the dual control switch box 10. A control rotating shaft 15 ismounted inside the rotating shaft cavity 10 a, wherein one end of thecontrol rotating shaft 15 is connected to the handle 14, and the end ofthe control rotating shaft 15 is connected to the push-button 13 by acontrol swing rod 16. Besides, the control rotating shaft 15 isconnected to the control chain component 9.

Besides, a linkage component (not shown in the figures) and a connectingmember (not shown in the figures) are provided inside the dual controlswitch box 10, wherein the linkage component comprises a control linkbar 17 and a control slider 18, one end of the control link bar 17 isconnected to the control rotating shaft 15 and the other end of thecontrol link bar is connected to the control slider 18; the controlchain component 9 is connected to the control slider 18; the connectingmember comprises the control swing rod 16 sleeved on the controlrotating shaft 15.

The handle 14 is connected to the control chain component 9 by thelinkage component; the push button 13 is connected to the controlrotating shaft 15 by the connecting member.

Moreover, for better installing the handle 14 and the push-button 13, ahandle-positioning blocker 21 and a button-positioning blocker 20 arerespectively provided inside the dual control switch box 10 forpositioning and installing the handle 14 and the push-button 13.

For the flush valve of the present invention, in specific operation, thetwo flush control manners of the push-button 13 and the handle 14 bringgreat convenience to repair workers and users. The repair workers canchoose casually a cistern with a button or a cistern with a handle whenchanging the cistern, avoiding purchasing multiple parts when having noidea about the size and the type of a cistern or customers' favors. Theusers can choose the manners of the push-button or the handle accordingto practical needs; when choosing the manner of the handle, turning thehandle clockwise or counterclockwise would drive the control rotatingshaft 15 to drive the control link bar 17 and the control slider 18, andthe control link bar 17 and the control slider 18 further drive thecontrol chain component 9, in such a manner that the function ofhalf-flush or full-flush is activated; when choosing the manner of thepush-button, pressing down the full-flush button 13 a or the half-flushbutton 13 b of the push-button 13 would drive the control swing rod 16to drive the control rotating shaft 15, the control rotating shaft 15further drives the control link bar 17 and the control slider 18, andthe control link bar 17 and the control slider 18 drive the controlchain component 9, in such a manner that the function of half-flush orfull-flush is activated.

As indicated in pictures from FIG. 1 to FIG. 4, when installing theflush valve of the present invention, users can firstly disassemble asingle flush drain valve, and then install the dual flush valve body 2on the positioning base 3, and then install the adjustment positioningcircle 5 inside the retaining cylinder 31 on the flapper overflow tube11 and optionally put the adjustment insert-plate 8 into the adjustmentpositioning circle 5 according to the specific diameter of the overflowtube 11, and finally, after regulating a location of the dual flushvalve body 2, lock up the dual flush drain valve body 2 on the flapperoverflow tube 11 by the locking component. The users can easily changethe ordinary single flush drain valve into the dual flush drain valvewithout complicated operations. Simple and easy installment makes itpossible to change without professionals. Low installment cost andsaving water efficiently fit with people's current demands of savingenergy.

It will thus be seen that the objects of the present invention have beenfully and effectively accomplished. Its embodiments have been shown anddescribed for the purposes of illustrating the functional and structuralprinciples of the present invention and is subject to change withoutdeparture from such principles. Therefore, this invention includes allmodifications encompassed within the spirit and scope of the followingclaims.

1. A flush valve, comprising: a dual flush valve body for connecting toa flapper overflow tube, a positioning base matching with said dualflush valve body, an elastic sealing gasket provided on said positioningbase for matching with a sealing layer on a flapper base, and a dualcontrol switch box applicable with either a push button or a handle. 2.The flush valve, as recited in claim 1, wherein a retaining cylinder isprovided on said positioning base for attaching on the flapper overflowtube.
 3. The flush valve, as recited in claim 2, wherein an adjustmentpositioning circle is provided inside said retaining cylinder formatching with the flapper overflow tube.
 4. The flush valve, as recitedin claim 3, wherein one end of said adjustment positioning circle is anopening loop having an open part and the other end of said adjustmentpositioning circle is a cylinder.
 5. The flush valve, as recited inclaim 4, wherein a locking component for locking up said adjustmentpositioning circle is provided on said open part.
 6. The flush valve, asrecited in claim 5, wherein two locking lugs are provided on said openpart of said adjustment positioning circle and a locking hole isprovided in each of said locking lugs for installing said lockingcomponent.
 7. The flush valve, as recited in claim 6, wherein saidlocking component comprises a butterfly bolt for crossing through saidlocking hole and a butterfly nut matching with said butterfly bolt. 8.The flush valve, as recited in claim 6, wherein an adjustmentinsert-plate is provided in said adjustment positioning circle formatching flapper overflow tubes of different diameters.
 9. The flushvalve, as recited in claim 8, wherein the sealing layer on the flapperbase and said elastic sealing gasket are installed plane to plane oroblique to oblique.
 10. The flush valve, as recited in claim 1, whereinsaid dual control switch box comprises a control chain componentconnected to said dual control switch box for controlling an operationstate of said flush valve.
 11. The flush valve, as recited in claim 10,wherein a rotating shaft cavity is provided inside said dual controlswitch box, a control rotating shaft is mounted inside said rotatingshaft cavity, wherein a handle is connected to one of said controlrotating shaft, a control swing rod is connected to the other end ofsaid control rotating shaft, and said control rotating shaft isconnected to said control chain component.
 12. The flush valve, asrecited in claim 11, wherein a linkage component is provided inside saiddual control switch box, and said handle is connected to said controlchain component by said linkage component.
 13. The flush valve, asrecited in claim 12, wherein said linkage component comprises a controllink bar and a control slider; wherein one end of said control link baris connected to said control rotating shaft and the other end of saidcontrol link bar is connected to said control slider; said control chaincomponent is connected to said control slider.
 14. The flush valve, asrecited in claim 13, wherein a connecting member is provided inside saiddual control switch box and said push-button is connected to saidcontrol rotating shaft by said connecting member.
 15. The flush valve,as recited in claim 14, wherein said connecting member comprises saidcontrol swing rod sleeved on said control rotating shaft.
 16. The flushvalve, as recited in claim 15, wherein a handle-positioning blocker isprovided in said dual control switch box for positioning and installingsaid handle.
 17. The flush valve, as recited in claim 16, wherein abutton-positioning blocker is provided in said dual control switch boxfor positioning and installing said push-button.